In vitro evaluation of an alternative method to bond molar tubes

Célia Regina Maio Pinzan-Vercelino, Arnaldo Pinzan, Júlio de Araújo Gurgel, Fausto Silva Bramante, Luciana Maio Pinzan, Célia Regina Maio Pinzan-Vercelino, Arnaldo Pinzan, Júlio de Araújo Gurgel, Fausto Silva Bramante, Luciana Maio Pinzan

Abstract

Despite the advances in bonding materials, many clinicians today still prefer to place bands on molar teeth. Molar bonding procedures need improvement to be widely accepted clinically.

Objective: The purpose of this study was to evaluate the shear bond strength when an additional adhesive layer was applied on the occlusal tooth/tube interface to provide reinforcement to molar tubes.

Material and methods: Sixty third molars were selected and allocated to the 3 groups: group 1 received a conventional direct bond followed by the application of an additional layer of adhesive on the occlusal tooth/tube interface, group 2 received a conventional direct bond, and group 3 received a conventional direct bond and an additional cure time of 10 s. The specimens were debonded in a universal testing machine. The results were analyzed statistically by ANOVA and Tukey's test (α=0.05).

Results: Group 1 had a significantly higher (p<0.05) shear bond strength compared to groups 2 and 3. No difference was detected between groups 2 and 3 (p>0.05).

Conclusions: The present in vitro findings indicate that the application of an additional layer of adhesive on the tooth/tube interface increased the shear bond strength of the bonded molar tubes.

Figures

Figure 2
Figure 2
Specimen preparation. Group 2 and Group 3: conventional direct bond (A: vestibular view; B: occlusal view)
Figure 1
Figure 1
Specimen preparation. Group 1: with application of an additional layer of adhesive in the occlusal teeth/tube interface (A: vestibular view; B: occlusal view)

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